Which of the following options include only FREE phospholipid movement in membrane bilayers Multiple answers: You can select more than one option A Phospholipid flipping (movement from one layer to another) B flexion rotation and lateral diffusion C lateral diffusion D insertion of new phospholipids E flipping and rotation *Pls don\'t bother answering if you are not 100% sure your answer is correct, Thanks* Solution Phospholipid movement in lipid bilayer follows several processes. phospholipid flipping is the main, it is due to the presene of transmembrane lipid transporter proteins known as FLIPPASES. they are responsible for phospholipid movement. Flipping dont involve rotation due to the FLUID MOSAIC nature of the membrane. LATERAL DIFFUSION- this is also an important process in phospholipid movement.there are many membrane proteins or lipid that cause lateral diffusion. because lipid bilayer has two roles; 1. it act as solvent for integral membrane protein. 2. it also act as a permiability barrier..